Button-hole attachment for sewing-machines



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T. s. HUNTINGTON.

BUTTON HOLE ATTACHMENT FOR SEWING MACHINES. No. 299,928. Patented June3, 1884.

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BUTTON HOLE ATTACHMENT FOR SEWING MACHINES.

v No. 299,928. Patented June 3, 1884.

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THOMAS S. HUNTINGTON, OF NEWV YORK, N. Y., ASSIGNOR TO THE NEW HOMESEWING MACHINE COMPANY, OF ORANGE, MASSACHUSETTS.

BUTTON-HOLE ATTACHMENT FOR SEWING-MACHINES.

EPECIPIC'ATION forming part of Letters Patent No. 299,928, dated. June3,1884.

Application filed August 13, 1883.

To on whom it may concern Be it known that I, THOMAS S. HUNTING- TON, ofNew York city, county, and State, have invented an Improvement inButton- Hole or Overseaming Attachments for Sewing- Machines, of whichthe following description, in connection with the accompanying drawings,is a specification, like letters on the drawings representing likeparts.

This invention has for its object the production of a sewingmachineattachment by which to work button-holes.

The features of my invention will be hereinafter described, andspecified in the claims at the end of the specification.

Figure 1 in front elevation represents a sewing-machine known as the NewHome with my improved button-hole-stitching attachment applied theretoin working position, the presser-foot bar, to which the attachment issecured, being partly lifted preparatory to placing below it the clothor material containing the button-hole to be worked. Fig. 2 is a topView of the attachment removed from the machine. Fig. 3 is an under sideview of Fig. 2. Fig. 4 is a section in the dotted line m, Fig. 2,through the ratchet of feeding mechanism, for feeding forward andbackward the plate which engages and carries with it the said material.Fig. 5 is a top view of the rocking plate to support the material aroundthe needle-hole in the throat-plate and under the feeding-plate, a partof the rocking plate being broken away to show the said throatplate.Fig. 6 is a section of Fig. 5; Fig. 7, a

detail of the barring-lever; and Fig. 8, a sec-.

. ruffling and other attachments, the said pin vibrating the said leverand causing the same, by its shortest arm, having a pin, 3, to engage aslot, 4, and move the pawl-carriage C, a part,

(ModclJ 5, of which is extended through a slot, C, in the standard A.The carriage C is provided with apivoted pawl, Cflacted upon by aspring, C*,which normally keeps the projecting wedgeshaped end or finger6 thereof in the line of the center of the shaft and the needle-hole, in

arm, D, attached to a short vertical shaft, D,

extended down through the plate A, where it is provided with a cam oreccentric, D which is placed between the walls 10 12, formed by making aslot, D in the vibrating and horizontally-moving feed-plate E. The arm Dhas a block, 13, adjustably attached to it by a screw, 14, the positionof the said block on the said arm D enabling the finger of the pawl C toengage one of its shoulders 15 16 sooner or later at each reciprocation,and consequently the vibration of the feed-plate E may be made variableaccording to the width desired for the stitching back from the edge ofthe button-hole slit, the greater the extent of movement of the cam Dthe greater the vibration of the plate E and the width of the edgecovered by the stitch, and vice versa. As the carriage C is movedforward at one stroke, the finger 6 of the pawl C meets the inclinedside 17 of the vibrator and shoulder 15 of the block 13 of the vibratorand turns the same into the position Fig. 2 As the carriage is nextmoved backward, the spring G acts to move the pawl C in the direction ofthe arrow into its centrallineposition, which places the finger 6 at oneside of the point of the arm D, so that as the carriage is again movedforward or toward the right in Fig. 2 the needle-bar then rising, thesaid finger 6, at such time acting against the inclined side 18 and,striking the shoulder 16, will move the arm D of the vibrator in the opposite direction. This movement of the arm D of the vibrator causes thecam D to operate first against the wall 10 and then against the wall 12of and vibrate the feed-plate E, the

teeth E of which engage the cloth or other material and compel the sameto move in unison with the plate E, thus enabling the eye-pointed needleof the machine to penetrate the material in which the buttonhole is tobe moved-as cloth or leather-first near the edge of the button-holeslit, and then to pass through the said slit, and so on in usual manner.

The plate A at its upper side is provided with a stiff yoke, F, having ahole, 21, for the reception of the lower end of the presser-bar F screws22 serving to attach the said yoke to the said presser-bar. The plate Ais provided with a hole, which receives a shaft, 24, having an enlargedhead, and extended upward through the said plate, it first passing,however, through slot 25 in a fulcrunrslide, F, and then through apinion, G, and then through a pawl-carrier, G, provided with a pawl, gand through a ratchet-wheel, G the hub G of which is notched to receivea pin, 26, extended through the said shaft 24, thus connecting theratchet with it. The pinion G is fast on the shaft 24, and its teeth areadapted to engage with either of the series 29 30 of teeth with whichthe feed-plate E is provided, according to the position of the saidplate with relation to the usual needle-hole of the throat-plate h.

7 contact with the teeth of pinion G, which latter then moves thefeeding-plate backward or forward, as the case may be, the cam Dvibrating the said plate as each stitch is made, so as to stitch throughand over the edge.

In Figs. 1, 2, and 3 the feeding-plate has been fed fully back, andbefore the said plate is next moved forward the feed-changing lever 33must be moved in the direction of the arrow upon it to move thefulcrum-slide and cause the teeth 30 to engage the pinion G, the lattergiving the plate E an intermitting for ward movement. The shaft 24derives its movement from the pawl (1 pivoted at 52 on the pawl carrier,pivoted on the said shaft. The pawl g has a toe, 37, and an ear, 38,provided with a regulating-screw, 39. The forward movement of the pawlg", to engage the ratchet G is produced by the toe 40 of the pawl Hstriking the screw 39 and forcing it in the direction of the arrow onsaid pawl. The return movement is effected by the toe of the lever H onits return engaging the toe 37; or it may be automatically accomplishedby a spring, 02 at the other end of the pawl-carrier, pivoted at 41 uponthe carriage G, and held by spring 42 down upon the upper side of abarring-lever, I, pivoted at 43, and having a toe, 44, and twodepressions or notches, 45 and 46-one at each side of it. (See Fig. 7.)

When the end 33 of the lever 33 is stopped directly upon the toe 44 ofthe barring-lever I, that end of the said lever under the pawl H islifted so high as to prevent the toe 40 of the latter striking theregulating-screw 39, and at such time the shaft 24 and pinion G arenotmoved, and the feed-plate E then has only a movement of vibrationderived from the cam D which enables any desired number of stitches tobe put in at the end of a buttonhole slit, to bar the-same, as will beunderstood. The operator, by pushing on the pad 48 of the barring-lever,may stop the forward or backward movement of the fecdin g-plate E.

In this attachment the material in which the buttonhole is beingstitched is moved only by the feed-plate E, its teeth E resting upon thesaid material about the button-hole slit, the latter occupying aposition substantially cen tral with relation to the opening E" in thesaid plate.

The usual throat-plate of the sewingmachine is removed, and athroat-plate, h, having a raised needle-throat, h, is substituted forit, and on this throat-plate is placed a rocking plate, h herein shownas circular, and having a conical seat, which is placed over theelevated throat 7/, also made conical, so that the said plate is free torock or turn to a limited extent to adapt its top or face to therequirement of the feed-plate E, which takes the place of the usualcloth-elamp, and to the thickness of the material between the feedplateE and the rocking plate 71/2, and enables the pressure of the plate E onthe material to be equalized, notwithstanding variations in thethickness of the latter. The plate h prevents the usual fourmotionedfeedingdog,l?", of the machine from engaging the under-side of thematerial. The plate h enables the material to be moved more accuratelythan were it omitted, and this is especially so when the material isswung laterally under the needle by the feed-lever as the latter isvibrated by the cam D Adjustment of the screw 39 enables a variation inthe proximity of the stitches to be made. The screw m acts 011 afriction-block, a, of. leather or other suitable material, to preventretrograde movement of the ratchet G.

The bed-plate of the sewing-machine is marked P, the usual head, 19*,the presser-foot lifting-lever P and the usual feed-dog, P. \Vith slightchanges in construction my apparatus may be adapted to various differentsewing-machines.

I do not broadly claim a longitudinally movable and vibratingplate.

I claim- 1. The base-plate A, the elbow-lever, the pawl 0 moved by it,the arm D, the cam D moved by it, and the adjustable shouldered blockcarried by the said arm, combined with the feed-lever E, and the pivotedfulcrum slide or plate F to operate substantially as described.

. 2. The base-plate and the feed-lever toothed bined with a rockingplate having its pivotconnection with the needle-throat h on the.

throat-plate, substantially as described.

3. The bed-plate A, the elbow-lever, the carriage moved by it, thefeeding-lever having teeth 29 30, a cam to vibrate it, the pinion toengage and move the said lever longitudinally, and a pawl and ratchet tomove the said pinion, combined with a pawl, H, and with a barring-lever,I, having the toe 44. and depressions, 45 46, and the lever 33 to engageit, to enable the longitudinal movement of the said feeding-lever to besuspended at will, substantially as described.

4. The base-plate A and the presser-bar, to which it is attached andheld by it above the bed-plate of the sewing-machine, the toothedfeed-lever E, the fulcrumslide to receive it, the shaft to hold the saidlever at the under side of the plate A, and the pinion G, comuate orleave at rest the said pawl and ratchet, which directly operate the saidpinion, substantially as described.

6. The base-plate A, having a portion, A,

upwardly turned and slotted, the bridge provided with a hole to receivethe presser-bar, the elbow-lever, and the carriage moved thereby, thetoothed feeding-lever provided with slot D and teeth 29 30,- arm D,block 13 thereon, and cam D constituting a vibrator, and the pinion G,combined with a pawl, G to move the vibrator, and means to rotate thesaid pinion, substantially as described.

7. The combination, with a button-hole ati tachment for sewing-machinesand the bedplate, of a conical needle-throat, h, and the plate if,having a conical recess, and thereby seated on said throat to tip orrock thereon, substantially as described.

8. The combination, with a button-hole attachment and sewing-machinebed, of a throatplate, its upwardly-extended throat having a conicaltip, and the rocking plate seated or pivoted on said tip, substantiallyas and for scribing witnesses.

THOS. S. HUNTINGTON.

WVitnesses:

E. T. THOMAS, EUGENE BREHM.

